WatchOS 7 was officially launched for a week. Some users posted on Apple's official support forum, stating that after upgrading watchOS 7 to the GPS version of Apple Watch Series 4, they found that Apple Watch cannot record GPS data normally when running without the cooperation of iPhone. And not only individual users, but most users also have disasters!
There have been more than 200 replies to this post, and many people have expressed the same problem. The related problem is not limited to the appearance of Apple Watch Series 4, even the newly launched Apple Watch Series 6 has the same problem. Some users said that first backing up and then re-pairing can solve the problem. Apple has not responded to the question at the moment.